For sale, in good condition, all that is missing is the small metal strip and the SMA to PL259 adapter.
The Diamond K400S is a deluxe, heavy duty, adjustable antenna mount for trunks or hatch backs. It features a UHF [SO-239] base and 13.5 feet of RG316/U coax cable terminating in an SMA male plug. This mount is rated to 500 watts FM, 700 watts PEP SSB.
This mount also comes with a rain cap.
Asking $40.00 + shipping.